virtio-pci: replace byte swap hack

Remove byte swaps by declaring the config space
as native endian.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

exec.c

@@ -2587,24 +2587,6 @@ int cpu_memory_rw_debug(CPUArchState *env, target_ulong addr,
 }
 #endif
 
-#if !defined(CONFIG_USER_ONLY)
-
-/*
- * A helper function for the _utterly broken_ virtio device model to find out if
- * it's running on a big endian machine. Don't do this at home kids!
- */
-bool virtio_is_big_endian(void);
-bool virtio_is_big_endian(void)
-{
-#if defined(TARGET_WORDS_BIGENDIAN)
-    return true;
-#else
-    return false;
-#endif
-}
-
-#endif
-
 #ifndef CONFIG_USER_ONLY
 bool cpu_physical_memory_is_io(hwaddr phys_addr)
 {

hw/virtio-pci.c

@@ -92,9 +92,6 @@
  */
 #define wmb() do { } while (0)
 
-/* HACK for virtio to determine if it's running a big endian guest */
-bool virtio_is_big_endian(void);
-
 /* virtio device */
 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */
 static inline VirtIOPCIProxy *to_virtio_pci_proxy(DeviceState *d)
@@ -403,15 +400,9 @@ static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr,
         break;
     case 2:
         val = virtio_config_readw(proxy->vdev, addr);
-        if (virtio_is_big_endian()) {
-            val = bswap16(val);
-        }
         break;
     case 4:
         val = virtio_config_readl(proxy->vdev, addr);
-        if (virtio_is_big_endian()) {
-            val = bswap32(val);
-        }
         break;
     }
     return val;
@@ -436,15 +427,9 @@ static void virtio_pci_config_write(void *opaque, hwaddr addr,
         virtio_config_writeb(proxy->vdev, addr, val);
         break;
     case 2:
-        if (virtio_is_big_endian()) {
-            val = bswap16(val);
-        }
         virtio_config_writew(proxy->vdev, addr, val);
         break;
     case 4:
-        if (virtio_is_big_endian()) {
-            val = bswap32(val);
-        }
         virtio_config_writel(proxy->vdev, addr, val);
         break;
     }
@@ -457,7 +442,7 @@ static const MemoryRegionOps virtio_pci_config_ops = {
         .min_access_size = 1,
         .max_access_size = 4,
     },
-    .endianness = DEVICE_LITTLE_ENDIAN,
+    .endianness = DEVICE_NATIVE_ENDIAN,
 };
 
 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,